While trying to log into the tekkit launcher I encountered an error where I attempted to log in with my minecraft username and password and it apparently was invalid. So I reset my password and double checked it. It still gave me an error.
I tried using my email address as well. That failed too.
There is not one solution to this problem that I have seen on the forums and that is the reason why I am posting.
Please help, I think I left the nuclear reactor on in my basement!